Books · head-to-head
Open Library vs PoetryDB
Open Library, an Internet Archive project, exposes its book catalog for search, work/edition/author lookups by identifier, subjects, and public reading lists, returned as JSON, YAML, or RDF/XML, with a separate Covers API serving cover art by ISBN or Open Library ID. No API key is required, though sending a descriptive User-Agent and contact email triples the default 1-request-per-second anonymous rate limit. Bulk access is deliberately kept off the live API — the project publishes free monthly data dumps for that instead.
Keyless JSON API for a curated collection of roughly 3,000 English-language poems across 129 authors, queryable by author, title, line content, or poem-count/line-count filters, with matching results returned as full structured poem objects. Built and maintained as a free open-source project with no rate limits or usage tiers documented anywhere.
| Open Library | PoetryDB | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, RDF/XML, YAML | JSON |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
Open Library supports 3 response formats, while PoetryDB offers fewer — pick Open Library for more integration flexibility.